M&S or Radley bag?

I need a new bag that I can use for work and have found the perfect style. M&S have one but then I saw a reduced Radley bag for not much more. I'm not in a profession where I have to look super-smart - I just want to look competent and have a decent bag that fits everything. I've never had an expensive label bag before and I would like your opinion as to whether a Radley bag will make me look like I'm trying too hard or flashing cash. Thanks.

The metal clasp on my three year old Radley bag broke after nearly daily use. I brought it back to the shop to see if it could be repaired. The shop manager said "I'm terribly sorry, all we can do is offer you a replacement bag" great customer service!